using Org.BouncyCastle.Asn1;

namespace Org.BouncyCastle.Asn1.Pkcs
{
	public class SafeBag
		: Asn1Encodable
	{
		private readonly DerObjectIdentifier bagID;
		private readonly Asn1Object bagValue;
		private readonly Asn1Set bagAttributes;

		public SafeBag(
			DerObjectIdentifier	oid,
			Asn1Object			obj)
		{
			this.bagID = oid;
			this.bagValue = obj;
			this.bagAttributes = null;
		}

		public SafeBag(
			DerObjectIdentifier	oid,
			Asn1Object			obj,
			Asn1Set				bagAttributes)
		{
			this.bagID = oid;
			this.bagValue = obj;
			this.bagAttributes = bagAttributes;
		}

		public SafeBag(
			Asn1Sequence seq)
		{
			this.bagID = (DerObjectIdentifier) seq[0];
			this.bagValue = ((DerTaggedObject) seq[1]).GetObject();
			if (seq.Count == 3)
			{
				this.bagAttributes = (Asn1Set) seq[2];
			}
		}

		public DerObjectIdentifier BagID
		{
			get { return bagID; }
		}

		public Asn1Object BagValue
		{
			get { return bagValue; }
		}

		public Asn1Set BagAttributes
		{
			get { return bagAttributes; }
		}

		public override Asn1Object ToAsn1Object()
		{
			Asn1EncodableVector v = new Asn1EncodableVector(
				bagID, new DerTaggedObject(0, bagValue));

			if (bagAttributes != null)
			{
				v.Add(bagAttributes);
			}

			return new DerSequence(v);
		}
	}
}
